Air valve



FIG. 1 is a side perspective view of the invented design for an air valve.

FIG. 2 is a front view of the air valve of FIG. 1.

FIG. 3 is a rear view of the air valve of FIG. 1.

FIG. 4 is a right side view of the air valve of FIG. 1.

FIG. 5 is a left side view of the air valve of FIG. 1.

FIG. 6 is a top view of the air valve of FIG. 1; and,

FIG. 7 is a bottom view of the air valve of FIG. 1.

The broken line showing is included for the purpose of illustrating environment and forms no part of the claimed design. 

CLAIM The ornamental design for an air valve, as shown and described. 